Mannequin



FIG. 1 is a perspective view of our design;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a back view of FIG. 1;

FIG. 4 is a right side elevational view of FIG. 1, the left side being a mirror image thereof; and,

FIG. 5 is a top plan view of FIG. 1. 

The ornamental design for a mannequin, as shown and described. 